The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 1994
Filed:
Oct. 16, 1992
Tamotu Nakamura, Saitama, JP;
Shigeru Kai, Saitama, JP;
Kabushiki Kaisha Showa Seisakusho, Saitama, JP;
Abstract
Tilt and trim cylinders have blind-end chambers connected through a main valve to a first port of a reversible pump. The rod-end chamber of the tilt cylinder is connected through the main valve to a second port of the reversible pump. The rod-end chamber of the trim cylinder is connected to an oil tank. The second port of the pump is connected to the oil tank, and the first port may be connected to either only the main valve or the oil tank through a suction-prevention valve, an orifice, or a pressure relief valve. When the pump is actuated with the tilt cylinder locked to keep an outboard engine in an tilted-up position, the trim cylinder is automatically contracted to withdraw its piston rod. Cavitation in an oil passage from the blind-end chamber of the trim cylinder to the pump is prevented when working oil is introduced from the oil tank to the pump through the orifice or the pressure relief valve.